Polar Sapphire Awarded Patent for Process for Making High-Purity Aluminum Oxide

Date18 November 2020
Publication Date18 November 2020
The abstract released by U.S. Patent and Trademark Office states, "A method comprises reacting an aluminum feedstock with an acid in the presence of water to provide an aluminum salt solution comprising an aluminum salt in water, wherein the aluminum salt comprises a reaction product of the acid and aluminum, and spray roasting the aluminum salt solution at a temperature of at least about 450.degree. C. to provide an aluminum oxide...

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